The Glastonbury ukulele busker who went viral for his 'cringe-worthy' serenade of Dua Lipa also bombarded fellow stars including Stormzy with impromptu performances at the festival. The musician known as 'Liam C', real name Liam Cowan bombarded several stars with impromptu performances with his ukulele at Glastonbury A video of singer Dua Lipa's unimpressed reaction to his tunes went viral …